I forget the length, sorry, but last time I got blades they didn't have the right size, so I got those ones you can cut to size, and they worked well. I need new ones again, but it's been 2 years, so they wore well.
I'm thinking of swapping them out for winter blades, as I always do for winter, but I put some new arms on my Tracker, that lack the open spring issues for snow and ice, and they've worked really well. So not sure what I'll put on, but will do it soon.